<template>
  <div class="search-container">
    <!-- 搜索栏 -->
    <form action="/" class="search-form">
      <van-search
        v-model="searchText"
        show-action
        placeholder="请输入搜索关键词"
        background="#3296fa"
        @search="onSearch"
        @cancel="onCancel"
        @focus="isReaultShow = false"
      />
    </form>
    <!-- 搜索栏 -->

    <!-- 搜索结果 -->
    <search-result v-if="isReaultShow" :searchText="searchText" />
    <!-- /搜索结果 -->

    <!-- 联想建议 -->
    <search-suggestion
      v-else-if="searchText"
      :searchText="searchText"
      @search="onSearch"
    />
    <!-- /联想建议 -->

    <!-- 搜索历史记录 -->
    <search-history
      v-else
      :searchHistory="searchHistories"
      @search="onSearch"
    />
    <!-- /搜索历史记录 -->
  </div>
</template>

<script>
import SearchHistory from "./components/search-history";
import SearchSuggestion from "./components/search-suggestion";
import SearchResult from "./components/search-result";
import { setItem, getItem } from "@/utils/storage";
export default {
  name: "SearchIndex",
  components: {
    SearchHistory,
    SearchSuggestion,
    SearchResult,
  },
  props: {},
  data() {
    return {
      searchText: "",
      isReaultShow: false,
      searchHistories: getItem("TOUTIAO_SEARCH_HISTORIES") || [],
    };
  },
  computed: {},
  watch: {
    searchHistories(value) {
      setItem("TOUTIAO_SEARCH_HISTORIES", value);
    },
  },
  created() {},
  methods: {
    onSearch(val) {
      this.$toast(val);
      this.searchText = val;
      // 存储搜索历史记录
      // 要求：不要有重复历史记录、最新的排在最前面
      const index = this.searchHistories.indexOf(val);
      if (index !== -1) {
        this.searchHistories.splice(index, 1);
      }
      this.searchHistories.unshift(val);

      // 渲染搜索结果
      this.isReaultShow = true;
    },
    onCancel() {
      this.$router.back();
    },
  },
};
</script>

<style scoped lang='less'>
.search-container {
  padding-top: 108px;
  .van-search__action {
    color: #fff;
  }
  .search-form {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1;
  }
}
</style>